TY - JOUR AU - Fernández Figueroa, María José AU - Montes Gutiérrez, David AU - Castro Rubio, Elisa De AU - Cornide Castro-Piñeiro, Manuel PY - 1994 DO - 10.1086/191866 SN - 0067-0049 UR - https://hdl.handle.net/20.500.14352/57930 T2 - Astrophysical journal supplement series AB - We report high-resolution observations of the Ca II H and K and Balmer Hα lines in 53 chromospherically active binary systems including the RS Canum Venaticorum binaries (RS CVn) and BY Draconis (BY Dra) classes. The rotational periods of the sample... LA - eng M2 - 433 PB - University Chicago Press KW - CVN system KW - Close binaries KW - Stars KW - Variability KW - Lines KW - Spectroscopy KW - Orbits TI - CaII H and K and Hα emissions in chromospherically active binary systems (RS Canum Venaticorum and BY Draconis) TY - journal article VL - 90 ER -